/**************************************************************************************************
 
  Phyplus Microelectronics Limited confidential and proprietary. 
  All rights reserved.

  IMPORTANT: All rights of this software belong to Phyplus Microelectronics 
  Limited ("Phyplus"). Your use of this Software is limited to those 
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  You acknowledge that the Software may not be modified, copied, 
  distributed or disclosed unless embedded on a Phyplus Bluetooth Low Energy 
  (BLE) integrated circuit, either as a product or is integrated into your 
  products.  Other than for the aforementioned purposes, you may not use, 
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  YOU FURTHER ACKNOWLEDGE AND AGREE THAT THE SOFTWARE AND DOCUMENTATION ARE
  PROVIDED AS IS WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED,
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  OF SUBSTITUTE GOODS, TECHNOLOGY, SERVICES, OR ANY CLAIMS BY THIRD PARTIES
  (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), OR OTHER SIMILAR COSTS.
  
**************************************************************************************************/



#include "bcomdef.h"
#include <stdio.h>
#include <string.h>
#include "OSAL.h"
#include "linkdb.h"
#include "att.h"
#include "gatt.h"
#include "gatt_uuid.h"
#include "gatt_profile_uuid.h"
#include "peripheral.h"
#include "gattservapp.h"

#include "ota_app_service.h"
#include "log.h"
#include "error.h"


CONST uint8 ota_ServiceUUID[ATT_UUID_SIZE] =
{ 0x23, 0xf1, 0x6e, 0x53, 0xa4, 0x22, 0x42, 0x61, 0x91, 0x51, 0x8b, 0x9b, 0x01, 0xff, 0x33, 0x58};

//command characteristic
CONST uint8 ota_CommandUUID[ATT_UUID_SIZE] =
{ 0x23, 0xf1, 0x6e, 0x53, 0xa4, 0x22, 0x42, 0x61, 0x91, 0x51, 0x8b, 0x9b, 0x02, 0xff, 0x33, 0x58};

// Response characteristic
CONST uint8 ota_ResponseUUID[ATT_UUID_SIZE] =
{ 0x23, 0xf1, 0x6e, 0x53, 0xa4, 0x22, 0x42, 0x61, 0x91, 0x51, 0x8b, 0x9b, 0x03, 0xff, 0x33, 0x58};


static CONST gattAttrType_t ota_Service = { ATT_UUID_SIZE, ota_ServiceUUID };

static uint8 ota_CommandProps = GATT_PROP_WRITE;
static uint8 ota_CommandValue = 0;

// OTA response Characteristic
static uint8 ota_ResponseProps = GATT_PROP_NOTIFY;
static uint8 ota_ResponseValue = 0;
static gattCharCfg_t ota_ResponseCCCD[GATT_MAX_NUM_CONN];


#define OTA_COMMAND_HANDLE 2
#define OTA_RSP_HANDLE 4
#define OTA_DATA_HANDLE 7
static gattAttribute_t ota_AttrTbl[] = 
{
  //OTA Service
  { 
    { ATT_BT_UUID_SIZE, primaryServiceUUID }, /* type */
    GATT_PERMIT_READ,                         /* permissions */
    0,                                        /* handle */
    (uint8 *)&ota_Service                /* pValue */
  },

    //OTA Command Declaration
    { 
      { ATT_BT_UUID_SIZE, characterUUID },
      GATT_PERMIT_READ, 
      0,
      &ota_CommandProps 
    },
    
      //OTA Command Value
      { 
        { ATT_UUID_SIZE, ota_CommandUUID },
        GATT_PERMIT_WRITE, 
        0, 
        &ota_CommandValue
      },
    

    // OTA response Declaration
    { 
      { ATT_BT_UUID_SIZE, characterUUID },
      GATT_PERMIT_READ, 
      0,
      &ota_ResponseProps
    },

      //response Value
      { 
        { ATT_UUID_SIZE, ota_ResponseUUID },
        GATT_PERMIT_READ, 
        0, 
        &ota_ResponseValue
      },
      
      // OTA response Client Characteristic Configuration
      { 
        { ATT_BT_UUID_SIZE, clientCharCfgUUID },
        GATT_PERMIT_READ | GATT_PERMIT_WRITE, 
        0, 
        (uint8 *) ota_ResponseCCCD
      },      

};


typedef struct {
  bool    notify_en;
  uint8_t ver_major;
  uint8_t ver_minor;
  uint8_t ver_revision;
  uint8_t ver_test_build;
  uint8_t ota_mode;
  uint8_t bank_info;
}ota_app_ctx;

ota_app_ctx s_ota_app;

bool s_reboot_flg = false;

static uint8 ota_ReadAttrCB( uint16 connHandle, gattAttribute_t *pAttr, 
                            uint8 *pValue, uint8 *pLen, uint16 offset, uint8 maxLen );
static bStatus_t ota_WriteAttrCB( uint16 connHandle, gattAttribute_t *pAttr,
                                 uint8 *pValue, uint8 len, uint16 offset );

static bStatus_t sendNotify(attHandleValueNoti_t *pNoti);
CONST gattServiceCBs_t ota_ProfileCBs =
{
  ota_ReadAttrCB,  // Read callback function pointer
  ota_WriteAttrCB, // Write callback function pointer
  NULL                       // Authorization callback function pointer
};



/*response format:*/
/*Byte  value*/
/*0     error code*/
/*1~19  response data payload*/
static void response(uint8_t* rsp_data, uint8_t size)
{
  attHandleValueNoti_t notif;
  
  osal_memset(&notif, 0, sizeof(notif));

  if(size > 20)
    return;
  
  notif.len = size;

  osal_memcpy(notif.value, rsp_data, size);
  sendNotify(&notif);
}

static int set_ota_mode(uint8_t mode)
{
  if(mode > OTA_MODE_RESOURCE)
    return PPlus_ERR_INVALID_PARAM;
  write_reg(OTA_MODE_SELECT_REG, mode);
  return PPlus_SUCCESS;
}

static void load_ota_version(void)
{
  uint32_t reg = read_reg(OTA_MODE_SELECT_REG);
  s_ota_app.ver_major = (uint8_t)((reg >>4) & 0xf);
  s_ota_app.ver_minor = (uint8_t)((reg >>8) & 0xf);
  s_ota_app.ver_revision = (uint8_t)((reg >>12) & 0xff);
  s_ota_app.ver_test_build = (uint8_t)((reg >>20) & 0xf);
  if(s_ota_app.ver_test_build)
    LOG("OTA Boot Version: %d.%d.%d%c\n", 
        s_ota_app.ver_major,s_ota_app.ver_minor,s_ota_app.ver_revision, s_ota_app.ver_test_build+'a'-1);
  else
    LOG("OTA Boot Version: %d.%d.%d\n", 
        s_ota_app.ver_major,s_ota_app.ver_minor,s_ota_app.ver_revision);
}

void __attribute__((weak)) ui_firmware_upgrade(void);

static void process_cmd(uint8_t* cmdbuf, uint8_t size){
  uint8_t rsp = PPlus_SUCCESS;
   switch(cmdbuf[0]){
  case OTAAPP_CMD_START_OTA:
    {
      uint8_t ota_mode = cmdbuf[1];
      s_reboot_flg = false;
      //set AON register then reboot
      rsp = set_ota_mode(ota_mode);
      if(rsp == PPlus_SUCCESS){
        //GAPRole_TerminateConnection();
        if(size != 3){
          NVIC_SystemReset();
        }
        if(cmdbuf[2] != 1){
          NVIC_SystemReset();
        }
        //if cmdbuf[2] is 1
        //case host will initiate termination request
        //when device terminated, device reboot to ota mode
        response(&rsp, 1);
        s_reboot_flg = true;
      }
      else
      {
        response(&rsp, 1);
      }
    }
    break;
  case OTAAPP_CMD_FORMAT:
    {
      rsp = PPlus_ERR_NOT_SUPPORTED;
      //format fs and application
      
      response(&rsp, 1);
    }
    break;
  case OTAAPP_CMD_INFO:
    {
      //take mac address and version info
      uint8_t info_rsp[20];
      osal_memset(info_rsp, 0, 20);
      info_rsp[0] = PPlus_SUCCESS;
      GAPRole_GetParameter(GAPROLE_BD_ADDR, info_rsp+1);
      if(s_ota_app.ver_test_build){
        sprintf((char*)(info_rsp+7), "V%d.%d.%d%c", 
                s_ota_app.ver_major,
                s_ota_app.ver_minor,
                s_ota_app.ver_revision,
                'a'+s_ota_app.ver_test_build-1);
      }
      else
      {
        sprintf((char*)(info_rsp+7), "V%d.%d.%d",s_ota_app.ver_major,s_ota_app.ver_minor,s_ota_app.ver_revision);
      }
      response(info_rsp, 8+strlen((const char*)info_rsp+7));

    }
    break;

  default:
    rsp = PPlus_ERR_OTA_UNKNOW_CMD;
    response(&rsp, 1);
  }
}

static void handleConnStatusCB( uint16 connHandle, uint8 changeType )
{ 
  // Make sure this is not loopback connection
  LOG("handleConnStatusCB %x, %d\n", connHandle,changeType );
  if ( connHandle != LOOPBACK_CONNHANDLE )
  {
    // Reset Client Char Config if connection has dropped
    if ( ( changeType == LINKDB_STATUS_UPDATE_REMOVED )      ||
         ( ( changeType == LINKDB_STATUS_UPDATE_STATEFLAGS ) && 
           ( !linkDB_Up( connHandle ) ) ) )
    { 
      GATTServApp_InitCharCfg( connHandle, ota_ResponseCCCD);
      if(s_reboot_flg){
        NVIC_SystemReset();
      }
    }
    else
    {
      s_reboot_flg = false;
    }
  }
}

static bStatus_t sendNotify(attHandleValueNoti_t *pNoti)
{
  uint16 connHandle;
  uint16 value;

  GAPRole_GetParameter(GAPROLE_CONNHANDLE, &connHandle);
  value = GATTServApp_ReadCharCfg( connHandle, ota_ResponseCCCD);

  if(connHandle == INVALID_CONNHANDLE)
    return bleIncorrectMode;
  
  // If notifications enabled
  if ( value & GATT_CLIENT_CFG_NOTIFY )
  {
    // Set the handle
    pNoti->handle = ota_AttrTbl[OTA_RSP_HANDLE].handle;
  
    // Send the Indication
    return GATT_Notification( connHandle, pNoti, FALSE);
   
  }
  return bleIncorrectMode;
  
}


static uint8 ota_ReadAttrCB( uint16 connHandle, gattAttribute_t *pAttr, 
                            uint8 *pValue, uint8 *pLen, uint16 offset, uint8 maxLen )
{
  bStatus_t status = ATT_ERR_READ_NOT_PERMITTED;
  LOG("ReadAttrCB\n");
  // If attribute permissions require authorization to read, return error
  if ( gattPermitAuthorRead( pAttr->permissions ) )
  {
    // Insufficient authorization
    return ( ATT_ERR_INSUFFICIENT_AUTHOR );
  }

  return ( status );
}


static bStatus_t ota_WriteAttrCB( uint16 connHandle, gattAttribute_t *pAttr,
                                 uint8 *pValue, uint8 len, uint16 offset )
{
  bStatus_t status = SUCCESS;
  //uint8 notifyApp = 0xFF;
  // If attribute permissions require authorization to write, return error
  if ( gattPermitAuthorWrite( pAttr->permissions ) )
  {
    // Insufficient authorization
    return ( ATT_ERR_INSUFFICIENT_AUTHOR );
  }

  if ( pAttr->type.len == ATT_BT_UUID_SIZE )
  {
    // 16-bit UUID
    uint16 uuid = BUILD_UINT16( pAttr->type.uuid[0], pAttr->type.uuid[1]);
    if(uuid == GATT_CLIENT_CHAR_CFG_UUID)
    {
      status = GATTServApp_ProcessCCCWriteReq( connHandle, pAttr, pValue, len,
                                               offset, GATT_CLIENT_CFG_NOTIFY );
      if ( status == SUCCESS)
      {
        uint16 charCfg = BUILD_UINT16( pValue[0], pValue[1] );
      
        LOG("CCCD set: [%d]\n", charCfg);
        s_ota_app.notify_en = (charCfg == 1);
      }
    }

  }
  else
  {
    LOG("WR:%d\n", pAttr->handle);
    // 128-bit UUID Command
    if(pAttr->handle == ota_AttrTbl[OTA_COMMAND_HANDLE].handle)
    {
      process_cmd(pValue, len);
    }
  }
  return ( status );
}



bStatus_t ota_app_AddService(void)
{
  uint8 status = SUCCESS;

  // Register with Link DB to receive link status change callback
  VOID linkDB_Register( handleConnStatusCB  );
  
  load_ota_version();
  
  GATTServApp_InitCharCfg( INVALID_CONNHANDLE, ota_ResponseCCCD );
    
  // Register GATT attribute list and CBs with GATT Server App
  status = GATTServApp_RegisterService( ota_AttrTbl, 
                                        GATT_NUM_ATTRS( ota_AttrTbl ),
                                        &ota_ProfileCBs );

  
                                        
  if(status!=SUCCESS)
    LOG("Add OTA service failed!\n");
	
	

  return ( status );
}




